Select by xpath knowing only ending of element's attribute

Having such xml file. How can I select only that tag, which href attribute ends with parent, like third element below.

Determine it by position like elem = tree.findall('{*}CustomProperty')[2] does not fit because some documents might have only one parent href, others 5-10 and third might not have such hrefs at all.

I tend to use xpath but can not figure out how can I tell xpath to search for end of attribute match.

Also xpath is not must, I will be glad to use any way that fits to my purpose

So how can I get CustomProperty element which has a href attribute that ends with word parent ?

 <CustomProperty href="urn:1653267:643562dafewq:cs:46wey5ge:234566">urn:1653267:643562dafewq:cs:46wey5ge:234566:ss</CustomProperty>
 <CustomProperty href="urn:1653267:643562dafewq:cs:46wey5ge:234566">urn:1653267:643562dafewq:cs:46wey5ge:234566:ss</CustomProperty>
 <CustomProperty href="urn:1653267:643562dafewq:cs:46wey5ge:234566:parent">urn:1653267:643562dafewq:cs:46wey5ge:234566:ss</CustomProperty>

Thank you in advance for help